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La constante de estructura fina define la transparencia visual del grafeno
R R Nair1, P Blake, A N Grigorenko
1Manchester Centre for Mesoscience and Nanotechnology, University of Manchester, M13 9PL Manchester, UK.
Science (New York, N.Y.)
|April 5, 2008
Resumen
El grafeno es el grafeno.
Área de la Ciencia:
- Física de la materia condensada Física de la materia condensada Física de la materia condensada Física de la materia condensada Física de la materia condensada
- La electrodinámica cuántica es la electrodinámica cuántica.
Sus antecedentes:
- Pocos fenómenos en la física de la materia condensada dependen únicamente de las constantes fundamentales.
- La observación de tales fenómenos normalmente requiere equipo y condiciones especializadas.
Objetivo del estudio:
- Para demostrar que la opacidad del grafeno está determinada exclusivamente por la constante de estructura fina.
- Para resaltar una propiedad material definida por la física fundamental en lugar de las características específicas del material.
Principales métodos:
- Análisis teórico de la interacción del grafeno con la luz.
- Medición experimental de la absorción de luz en el grafeno suspendido.
Principales resultados:
- La opacidad del grafeno está definida únicamente por la constante de estructura fina (α).
- El grafeno en suspensión absorbe una fracción significativa (2,3%) de la luz blanca incidente.
- Esta absorción se atribuye a la estructura electrónica única del grafeno.
Conclusiones:
- El grafeno exhibe una propiedad óptica fundamental vinculada a la electrodinámica cuántica.
- El grosor de un átomo del material no impide una notable interacción con la luz.
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